Claude 3.7 Sonnet vs Mistral Devstral Medium

Compare Claude 3.7 Sonnet by Anthropic against Mistral Devstral Medium by Mistral AI, tested across 54 shared challenges. Updated April 2026.

Which is better, Claude 3.7 Sonnet or Mistral Devstral Medium?

Claude 3.7 Sonnet and Mistral Devstral Medium are both competitive models. Claude 3.7 Sonnet costs $3/M input tokens vs $0.4/M for Mistral Devstral Medium. Compare their real outputs side by side below.

Key Differences Between Claude 3.7 Sonnet and Mistral Devstral Medium

Claude 3.7 Sonnet is made by anthropic while Mistral Devstral Medium is from mistral. On pricing, Claude 3.7 Sonnet costs $3/M input tokens vs $0.4/M for Mistral Devstral Medium.

Our Verdict
Claude 3.7 Sonnet
Claude 3.7 Sonnet
Mistral Devstral Medium
Mistral Devstral MediumRunner-up

No community votes yet. On paper, Claude 3.7 Sonnet has the edge — bigger model tier, bigger context window, major provider backing.

Mistral Devstral Medium is 7.5x cheaper per token — worth considering if cost matters.

Too close to call
Writing DNA

Style Comparison

Similarity
92%

Claude 3.7 Sonnet uses 9.3x more headings

Claude 3.7 Sonnet
Mistral Devstral Medium
62%Vocabulary50%
35wSentence Length17w
0.99Hedging0.56
1.2Bold4.5
4.3Lists5.3
0.00Emoji0.00
1.78Headings0.19
0.23Transitions0.32
Based on 13 + 21 text responses
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Claude 3.7 SonnetMistral Devstral Medium

279 AI models invented the same fake scientist.

We read every word. 250 models. 2.14 million words. This is what we found.

AI Hallucination Index 2026
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